JP2571073Y2 - Plate holding device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing plate holding device which is provided with an openable and closable safety cover and holds a printing plate mounted on a plate cylinder.

[0002]

2. Description of the Related Art In a notch provided on the outer peripheral portion of a plate cylinder of various printing presses, a vise-side vise for fixing a grip-side end portion of a printing plate (hereinafter, simply referred to as a plate) is provided. After that, a plate vise device consisting of a butt-side vise that adds the butt-side end of the plate wrapped around the drum peripheral surface is fixed to the bottom of the notch and extended in the axial direction of the plate cylinder. ing. These holding sides,
The plate vise on the rear side is a long vise that extends in the axial direction of the plate cylinder, and is rotatably supported on the vise side and opens and closes by the rotation to open and close the plate. And a plurality of cams that engage with the edge notches of these holding plates, and the plurality of cams are fixed in parallel on a rotatable cam shaft. Have been. A plurality of compression coil springs for urging the gripper in the opening direction are interposed between the vise table and the gripper.

[0003] With this configuration, when the plate is to be held, when the cam shaft is rotated, the holding plate divided into a plurality of pieces in the axial direction of the plate cylinder is released from the engagement of the cam. The springs open at the same time due to the spring force of the compression coil spring.After inserting the edge of the plate between the gripper plate and the vise table, rotate the cam shaft in the opposite direction from the previous one. By the action, it rotates and closes against the elastic force of the compression coil spring, and holds the edge of the plate.

Further, for example, in the apparatus disclosed in Japanese Patent Application Laid-Open No. 1-127346, a rear side gripping surface of a plate conventionally formed in a circumferential direction of a plate cylinder is formed in a radial direction of the plate cylinder. Thus, the vise table and the holding plate extend in the radial direction of the plate cylinder, and the end of the plate is bent at a right angle by a separately provided plate bending machine. With this configuration, the butt-side end of the plate, which has the lip on its side and is wrapped around the body circumferential surface, has the bent portion inserted between the vise table and the lip plate. By swinging the gripper plate with the cam mechanism, the bent end of the plate can be gripped.
Thereafter, by moving the entire butt-side vise in the circumferential direction, the plate vise is uniformly stretched and closely attached to the body circumferential surface.

[0005] However, in such a conventional plate mounting apparatus, it is necessary to insert a heavy plate into a narrow opening of the side plate vice while holding the heavy plate by hand. Not only does it require a long time and a great deal of labor, but also because the plate that leads to the vice-side vise while wrapping around the cylinder does not adhere to the peripheral surface of the plate cylinder, When the plate is bent to the right side, it is difficult to insert the back of the plate into the opening of the vise on the back side, and there is a problem that it takes more time and the burden of labor increases.

Therefore, conventionally, the printing plate provided on the safety cover by using a freely openable and closable safety cover for automatically rotating the plate cylinder and opening and closing the plate vise and covering the peripheral surface of the plate cylinder is provided. A semi-automatic plate mounting device has been proposed in which a plate is held in a holding device and a safety cover is opened at the end of a printing operation to mount the plate on a plate cylinder. A safety cover in this type of plate mounting device includes an arm rotatably supported on the machine side and rotated by a driving device, and an arm supported by this arm and vertically moved by the rotation of the hanging arm. A cover is provided, and a plate receiver for supporting a lower end of the plate is provided at a lower end portion of the cover. In addition, a plate holding bar is provided at the upper end of the cover to hold the central portion in the vertical direction of the plate whose lower end is supported by the plate receiver.

[0007] With this configuration, when the plate is replaced, the plate to be mounted is supported by the plate receiver of the cover during printing or the like. The plate is held by a safety cover which is held by a plate holding bar and is lowered and closed. When the printing operation is completed, when the arm is rotated by the driving device, the cover is raised while holding the plate, and the work surface corresponding to the plate cylinder is opened. Then, when the push button is operated, the plate cylinder is rotated and stopped at a predetermined position, and the plate vise is opened and closed. Therefore, the used plate is held and removed by hand.

When the push button is operated, the plate-side vise on the plate cylinder stops and opens at a position corresponding to the work surface, so that the plate is held by hand and removed from the plate receiver, and the plate-side vise is removed. When the push button is operated while inserted into the holding surface, one end of the plate is added to the holding plate vise. Thereafter, rotation of the plate cylinder and opening and closing of the back side vice are performed to add the other end of the plate to the back side vice, thereby completing the mounting of the plate. In this way, the rotation of the plate cylinder and the opening and closing of the plate vise are automatically performed, and when the plate end is inserted into the plate holding surface, the plate bottom side is held by the plate holding bar. Work is easy and safe.

[0009]

However, in such a conventional plate holding device, the plate whose lower end is supported by the plate receiver is only held at the center in the vertical direction by the plate receiving bar. Therefore, when mounting the plate with the safety cover open, the upper half of the plate warps in the direction of the worker and may touch the worker's face. There is a problem that mounting work is hindered.
However, if the length of the cover in the vertical direction is made sufficiently long and the part to be held by the plate holding bar is moved to the plate bottom, or another plate holding bar that supports the plate bottom is provided, the longer cover There is a problem that the upper part or lower part of the printing unit obstructs, for example, the maintenance of the inking device provided at the upper part of the printing unit, and the cleaning device for the blanket cylinder cannot be installed.

The present invention has been made in view of the above points, and an object of the present invention is to provide a printing plate holding device which can hold a plate safely without hindering a plate mounting operation.

[0011]

In order to achieve the above object, according to the present invention, a support arm pivotally supported by a machine frame, and a support arm pivotally suspended by the support arm to rotate the support arm. A plate holding device provided on a safety cover consisting of a cover that opens and closes a work surface by moving up and down, a plate receiver protruding from the cover and supporting the lower end of the plate, and is pivotally mounted on a support arm so as to be rotatable. A plate receiving arm that supports the plate receiving member that supports the upper side of the plate at the tip, and an integrated
Attached to the bottom of the plate receiving arm
A plate receiving arm contact member is provided between the arm pivot portion and the plate receiving member . In the invention according to claim 2, an adjusting mechanism for adjusting the length of the plate receiving arm is provided.

[0012]

When mounting the plate on the plate cylinder, the lower end of which is supported by the plate holder and the center of the plate in the vertical direction is held by the plate holding bar, when the support arm is rotated by the driving device, the cover body rises. When the work surface is opened and the plate receiving arm contact member on the cover side pushes up the plate receiving arm, the plate receiving member at the leading end of the plate receiving arm slides on the plate and moves upward, and the plate bottom portion is moved. , So that the upper half of the plate does not warp to the worker side. In addition, since the length of the plate receiving arm can be adjusted, the position for holding the plate can be adjusted according to the material and thickness of the plate, and the plate receiving arm can be rolled when the cover is closed. Since a gap can be provided between the plate receiving member and the cover by making contact with the plate, the plate can be easily inserted and held.

[0013]

1 to 3 show an embodiment of a plate holding apparatus according to the present invention. FIG. 1 is a front view of a printing unit embodying the present invention, FIG. 2 is a side view thereof, and FIG. FIG. In the figure, a plate cylinder 1 and a blanket cylinder 2 are arranged inside a printing unit so as to be in contact with each other, and a notch 3 is provided on the outer peripheral portion of the plate cylinder 1 over its entire length. Inside the notch 3, a grip-side plate vise 4 and a tail-side plate vice 5 are provided extending in the axial direction of the notch 3.

The gripping side vise 4 has gripping surfaces 6a, 7
A vise table 6 and a gripping plate 7 are provided so as to face each other in the axial direction of the notch 3. When the cam 8 is rotated by a driving device (not shown), the gripping plate 7 swings. The grip surfaces 6a and 7a are configured to open and close.
The vice 5 has a vise table 9 and a gripping plate 10 which extend in the axial direction of the notch 3 with the gripping surfaces 9a and 10a facing each other.
By rotating the grip 1, the grip plate 10 swings to open and close the grip surfaces 9a, 10a.

The safety cover, generally designated by the reference numeral 12, has brackets 15 fixed on the upper surfaces of the machine frames 13 on both the right and left sides via bracket stands 14, respectively. The U-shaped portion 15a of the bracket 15 has An air cylinder 16 as a driving device is pivotally supported by a U-shaped portion 16a so as to be swingable. A lever 18 having a long hole 18a is mounted on the working end of a piston rod 17 which moves forward and backward by the air pressure of the air cylinder 16, and the long hole 18a of the lever 18 has a pin 19 on the bracket base 14 side. The pin 21 on the side of the swing lever 20 which is fixedly fastened to
Are slidably engaged.

The lever 18 is moved by the reciprocation of the piston rod 17.
A base end portion is fixed to a distal end portion of each of the right and left pins 19 that rotate through the base portion, and a support arm 22 formed in an inverted L-shape is fixed between the lower end portions of the left and right support arms 22. They are connected by stays 23. Also, the left and right support arms 2
A support pin 25 projecting from an upper end of a side plate 24a of a cover 24 formed in a rectangular plate shape is rotatably fitted in a shaft hole formed in a lower end portion of the cover 2. 1 hanging over the work surface. The upper half 24b of the cover 24 is rotatably supported by the lower half 24c with a hinge 26 so that only the upper half can be opened and closed.

An arm 28 with a roller extending upward is fixed to a projecting end of a connecting pin 27 projecting from the upper end of the cover 24 in a state parallel to the support pin 25. It is also fixed to the support pin 25. On the other hand, a plate receiving arm 29 is rotatably and pivotally attached to the upper ends of the left and right support arms 22, and the left and right plate receiving arms 29 have plate tips as plate receiving members. A roller 31 shown as an example of a plate receiving arm contact member pivotally attached to the upper end of the roller arm 28 is attached to the free end of the plate receiving arm 29.

In FIG. 1, what is indicated by reference numeral 32 is a plate.
At the lower end of the cover 24, there is provided a plate receiver 33 for supporting the lower end of the plate 32. Near the upper end of the cover 24, a plate holding bar 34 extending in the width direction of the cover 24 is provided.
The plate 32 is supported at both ends by a bar receiver 35 fixed to the cover 24, and the plate 32, the lower end of which is supported by the plate receiver 33, is held at the center in the vertical direction by the plate holding bar 34, Further, the plate holding bar 30 is configured to hold a position above the holding position of the plate holding bar 34. That is, the cover 2 shown by a solid line in FIG.
4, the plate 2 is held by the plate holding bar 30 at a position slightly higher than the holding position of the plate holding bar 34. However, the plate 2 is held at the raised position of the cover 24 shown by a chain line in FIG. Since the arm 29 is rotated by being pushed by the roller arm 28, the plate 2 is configured to be held by the plate holding bar 30 at a position considerably higher than the holding position of the plate holding bar 34. In FIG. 1, what is indicated by reference numeral 36 is a plate holder that holds the plate tail when the plate 32 is inserted into the plate vise 4.

The operation of the printing plate holding apparatus having the above-described configuration will be described. During the printing operation, the cover 24 of the safety cover 12 is closed as shown by the solid line in FIG.
Reference numeral 2 denotes a lower end supported by a plate receiver 33. Version 3
Reference numeral 2 denotes a plate which is held at the center in the vertical direction by a plate holding bar 34, and slightly above the plate holding bar 30.

If the plate is to be replaced from this state after the printing operation, the air cylinder 16 is operated to move the piston rod 17 forward, so that the lever 18 moves forward and the swing lever 20 swings. The pin 19 rotates in the counterclockwise direction in FIG. 1 and the support arm 22 fixed to the pin 19 rotates, and is rotated to the position shown by the dashed line in FIG. And stop. The cover 2 supported on the lower end by the rotation of the support arm 22
4 rises while holding the plate 32, and the front of the plate cylinder 1 is opened. When the cover 24 is lifted, the roller arm 28 integrated with the cover 24, the support pins 25, and the connecting pins 27 also rises from the solid line position in FIG. 1 to the chain line position in FIG. The plate holding bar 30 for connecting the leading ends of the plate receiving arms 29 to the position indicated by the dashed line moves toward the upper end of the plate 32 while sliding on the plate 32. Therefore, the plate 32 does not warp in the direction of the worker.

After opening the cover 24 in this manner,
The used plate mounted on the plate cylinder 1 is removed by opening and closing the plate vices 4 and 5 and rotating the plate cylinder 1 and is taken out of the machine. Next, the plate 32 prepared as described above is gripped and its lower end is detached from the plate receiver 33, and is held between the holding surfaces 6a and 7a of the plate side vice 4 of the plate cylinder 1 stopped at the position shown in the figure. Insert into At the time of this insertion, the plate bottom is held by the plate holding bars 30 and 34, so that the operator only needs to grip the plate 32, the insertion of the plate 32 is easy, and the upper half of the plate 32 Is safe because it does not bend in the direction of the worker.

After the plate 32 is inserted, the gripping surfaces 6a and 7a are closed by a push button operation, the plate cylinder 1 is rotated almost once, and the rear side vice 5 is stopped corresponding to the work surface. 9
Since the a and 10a open and close, the rear side of the plate 32 is held, and the rear side vice 5 is moved in the circumferential direction of the plate cylinder 1, whereby the plate 32 is stretched and the mounting of the plate 32 is completed.

FIGS. 4 to 6 show an embodiment of the plate holding device according to claim 2, FIG. 4 is a schematic front view of a printing unit embodying the present invention, and FIG. FIG. 6 is a cross-sectional view of the front view of the connecting portion. In the present invention, the plate receiving arm 2 according to the invention of claim 1 is used.
9 is different in that the length is adjustable, and the other parts are the same as those of the first aspect of the invention. Therefore, FIG.
A description will be given of a plate receiving arm length adjusting mechanism indicated by reference numeral 40 in FIG. In the figure, the support arm 2
2 is provided with a bolt hole 22a, and a long hole 29a is provided at the tip of the plate receiving arm 29A. The plate receiving arm 29A and the support arm 22 are connected to the bolt hole 22a and the long hole. It is fixed by a bolt 41 inserted into 29a.

That is, the bolt 41 has a flange 41a,
The large diameter portion 41b, and the small-diameter portion 4 1c, be formed by the end thread portion 41d, the bolt hole 22a of the support arm 22, the large diameter portion 41b of the bolt 41 is prevented from missing at the flange portion 41a is round It is movably fitted and has a long hole 29a.
The small diameter portion 4 1c of the bolt 41 is fitted into. Then, the tip screw portion 41 of the bolt 41 into which the washer 42 is fitted
A nut 43 is screwed into d. Thus, after the nut 43 is loosened to move the relative position between the plate receiving arm 29A and the support arm 22, the nut 43 is tightened to adjust the length of the plate receiving arm 29A. I have. By doing so, the position for holding the plate can be adjusted depending on the material and thickness of the plate, and when the cover 24 is closed, the plate receiving arm 29A comes into contact with the roller 31 and the plate holding bar 29A and the cover A gap is formed between the plate 32 and the plate 32, and the plate 32 can be easily inserted.

In each of the above embodiments, the cover 2
The roller 31 is illustrated as a plate receiving arm contact member that pushes up the plate receiving arm 29 to the position indicated by the dashed line in FIG. 1 in order to release the roller 4. However, the present invention is not limited to this. Or a bar connecting the distal ends of the arm-equivalent members with left and right rollers. Further, in each embodiment, the left and right plate receiving arms 29 (29A) are illustrated as the plate receiving members that guide the upper end of the plate 32 by sliding contact when the cover 24 is opened and closed. 29A) may be pins protruding in a cantilever form.

4 to 6 showing an embodiment of the invention according to the second aspect, as a mechanism for adjusting the length of the plate receiving arm 29A, the bolt 41 is engaged with the elongated hole 29a, and the bolt 41 is connected to the nut 43. However, the present invention is not limited to this. For example, the plate receiving arm 29A may be divided in the length direction, and the divided members may be connected to each other so as to be adjustable in length.

[0027]

As is apparent from the above description, according to the present invention, according to the present invention, the support arm pivotally supported by the machine frame, the support arm is suspended by the support arm, and is vertically moved by the rotation of the support arm. A plate holding device provided on a safety cover consisting of a cover for opening and closing the work surface, a plate receiver protruding from the cover and supporting the lower end of the plate, and a pivotally rotatably mounted on the support arm at the tip end. A plate receiving arm that supports the plate receiving member that supports the upper side of the plate, and is integrally attached to the cover side
A is version received the lower side of the arm pivot of this edition received arm
When the plate receiving arm contacting member is provided between the mounting portion and the plate receiving member, and the plate supported by the plate receiving member and the central portion in the vertical direction held by the plate holding bar is mounted on the plate cylinder. ,
When the support arm is rotated, the cover is raised to open the work surface, and the plate receiving arm contact member provided on the cover pushes up the plate receiving arm, so that the plate at the leading end of the plate receiving arm is pressed. Since the receiving member slides upward on the plate and moves upward to hold the bottom of the plate, the upper half of the plate does not warp to the worker side to hit the worker's face, thereby improving safety. . In addition, the plate can be easily mounted on the plate cylinder, and workability is improved.

Further, in the invention according to the second aspect, since the length of the plate receiving arm connected to the support arm can be adjusted, the position for holding the plate can be adjusted according to the material and thickness of the plate. And a gap can be provided between the plate holding bar and the cover by bringing the plate receiving arm into contact with the rollers when the cover is closed, so that the plate can be easily inserted and held, thereby improving workability. .

[Brief description of the drawings]

FIG. 1 is a front view of a printing unit implementing a plate holding device according to the present invention.

FIG. 2 is a front view of a printing unit implementing the plate holding device according to the present invention.

FIG. 3 is a front view of a printing unit implementing the plate holding device according to the present invention.

FIG. 4 is a schematic front view of a printing unit in which the plate holding device according to claim 2 is implemented.

FIG. 5 is a front view of a connecting portion between the support arm and the plate receiving arm according to the invention of claim 2;

FIG. 6 is a transverse sectional view of a connecting portion between the support arm and the plate receiving arm according to the invention of claim 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 12 Safety cover 13 Machine frame 16 Air cylinder 22 Support arm 24 Cover 28 Roller arm 29 Plate receiving arm 29A Plate receiving arm 29a Slot 30 Plate holding bar 31 Roller 32 Plate 33 Plate receiving 34 Plate holding bar 40 Length adjusting mechanism 41 bolt 43 nut

Claims (2)

(57) [Scope of request for utility model registration] 1. A safety cover comprising a support arm pivotally supported by a machine frame and a cover which is suspended and suspended by the support arm and moves up and down by the rotation of the support arm to open and close a work surface. A plate holding device provided,
A plate receiver projecting from the cover and supporting the lower end of the plate; and
A plate- bearing arm for supporting a plate-receiving sub-material to be supported; and a lower side of the plate-receiving arm integrally attached to the cover side.
And the pivoting portion of the plate receiving arm and the plate receiving member
A plate holding device, comprising: a plate receiving arm contact member that comes into contact therewith. 2. The plate holding device according to claim 1, further comprising an adjusting mechanism for adjusting the length of the plate receiving arm.